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@dat-adi
Created December 16, 2022 10:07
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This script was made to emulate a station migration scenario, in a heterogeneous controller environment, using Mininet-Wifi.
#!/usr/bin/python
"""
This script is used to emulate a scenario where
a station migrates from one AP to another, while
attempting to ping a station from the third AP.
Controllers used to test: ODL, FL, Ryu.
Emulator used: Mininet-Wifi
Initial state
-------------
AP1 AP3
| |
sta1.............sta3
AP2
Final state
-----------
AP1 AP3
|
sta3
.
.../
../
AP2 .../
| ../
sta1
"""
from mininet.node import Controller, RemoteController
from mininet.log import setLogLevel, info
from mn_wifi.net import Mininet_wifi
from mn_wifi.node import Station
from mn_wifi.cli import CLI
from mn_wifi.link import wmediumd
from mn_wifi.wmediumdConnector import interference
def network_init():
# Setting initial network config
net = Mininet_wifi(
topo=None,
build=False,
link=wmediumd,
wmediumd_mode=interference,
)
info("*** Adding controller\n")
c0 = net.addController(
name="c0", controller=RemoteController, ip="192.168.0.122", protocols="tcp", port=6653
)
c1 = net.addController(
name="c1", controller=RemoteController, ip="192.168.0.141", protocols="tcp", port=6653
)
c2 = net.addController(
name="c2", controller=RemoteController, ip="192.168.0.217", protocols="tcp", port=6633
)
info("*** Add switches/APs\n")
ap1 = net.addAccessPoint(
"ap1", ssid="ap1-ssid", channel="1", mode="g", position="270,339,0"
)
ap2 = net.addAccessPoint(
"ap2", ssid="ap2-ssid", channel="2", mode="g", position="790,340,0"
)
ap3 = net.addAccessPoint(
"ap3", ssid="ap3-ssid", channel="3", mode="g", position="270,1039,0"
)
info("*** Add hosts/stations\n")
sta1 = net.addStation("sta1", ip="192.168.0.29", position="300,400,0")
sta2 = net.addStation("sta2", ip="192.168.0.25", position="300,300,0")
sta3 = net.addStation("sta3", ip="192.168.0.35", position="700,470,0")
sta4 = net.addStation("sta4", ip="192.168.0.28", position="700,500,0")
sta5 = net.addStation("sta5", ip="192.168.0.26", position="300,1000,0")
net.configureWifiNodes()
info("*** Add links\n")
net.addLink(ap1, sta1)
net.addLink(ap1, sta2)
net.addLink(ap2, sta3)
net.addLink(ap2, sta4)
net.addLink(ap3, sta5)
net.addLink(ap1, ap2)
net.addLink(ap1, ap3)
info("*** Mobility\n")
p1, p2 = dict(), dict()
p1 = {"position": "300, 1000, 0"}
p2 = {"position": "270, 300, 0"}
net.startMobility(time=0, AC="ssf")
net.mobility(sta5, "start", time=1, **p1)
net.mobility(sta5, "stop", time=60, **p2)
net.stopMobility(time=60)
net.plotGraph(max_x=1000, max_y=1000)
info("*** Starting network\n")
net.build()
info("*** Starting controllers\n")
for controller in net.controllers:
controller.start()
info("*** Starting switches/APs\n")
net.get("ap1").start([c0, c1, c2])
net.get("ap2").start([c0, c1, c2])
net.get("ap3").start([c0, c1, c2])
info("*** Post configure nodes\n")
CLI(net)
net.stop()
if __name__ == "__main__":
network_init()
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